If you're looking for a quick yet enriching getaway, a one-day tour of Agra, Mathura, and Vrindavan by car is an excellent choice. This journey offers a mix of historical marvels, spiritual sites, and cultural experiences. Here's a perfect itinerary to make the most of your day trip.

Early Morning: Start from Delhi
1. Departure
Begin your journey early in the morning, ideally around 6:00 AM. The drive from Delhi to Agra via the Yamuna Expressway takes approximately 3-4 hours. Starting early helps you beat the traffic and maximize your sightseeing time.

Morning: Agra
2. Taj Mahal
Your first stop is the iconic Taj Mahal. This UNESCO World Heritage site is a symbol of love and architectural brilliance. Arriving early allows you to enjoy the serene beauty of the Taj Mahal without the usual crowds. Don't forget to take a moment to admire the intricate marble work and the tranquil gardens.

3. Agra Fort
After the Taj Mahal, head to the nearby Agra Fort. This historical fort, also a UNESCO World Heritage site, offers a glimpse into India's rich Mughal history. The fort's impressive architecture and stunning views of the Taj Mahal make it a worthwhile visit.

Late Morning: Drive to Mathura
4. Shri Krishna Janmasthan Temple
Drive to Mathura, the birthplace of Lord Krishna, located about 60 kilometers from Agra. The Shri Krishna Janmasthan Temple complex is a major pilgrimage site for Hindus. Explore the temples and the small museums within the complex that depict various events from Krishna's life.

Afternoon: Vrindavan
5. Prem Mandir
From Mathura, proceed to Vrindavan, just a short drive away. Start your Vrindavan visit with Prem Mandir, a beautiful temple known for its intricate marble carvings and colorful lighting displays. The temple is dedicated to Radha Krishna and is a peaceful spot to relax and reflect.

6. Banke Bihari Temple
Next, visit the famous Banke Bihari Temple, a vibrant and lively temple dedicated to Lord Krishna. The temple is known for its unique rituals and festive atmosphere. It's a great place to experience the local culture and devotion.

7. ISKCON Vrindavan
End your tour in Vrindavan with a visit to the ISKCON Temple, also known as Krishna Balaram Mandir. This temple is a center for the Hare Krishna movement and offers a peaceful atmosphere, beautiful deities, and delicious vegetarian food at their Govinda's restaurant.

Evening: Return to Delhi
After a full day of exploring, begin your journey back to Delhi in the evening. The drive takes about 3-4 hours, and you can stop for dinner at a roadside dhaba to enjoy some local cuisine before reaching Delhi.

Conclusion
A one-day tour of Agra, Mathura, and Vrindavan offers a rich blend of history, spirituality, and culture. Whether you're admiring the Taj Mahal, visiting the birthplace of Lord Krishna, or experiencing the vibrant atmosphere of Vrindavan, this trip promises to be a memorable experience. Make sure to start early, plan your route efficiently, and enjoy the journey through these incredible cities.